Vader76

95% of the time my car is fine. (2005 GT)

When I have power loss, I get a knocking sound higher than 6K RPM.
I tend to get the power loss more often during hotter days. (25C+)

Can fuel starvation from an overheating fuel pump cause that sound?

I recent have changed out coils/wires/plugs.

Should I try getting the fuel pump replaced first or straight off ask for a compression test.

Thanks

nycgps

iTrader: (1)

try to make a long and sharp left corner with maybe 1/4 tank of gas.

if your car bogs down, its your fuel pump.

if it doesnt, then its probably your engine.

Old Rotor

The noise you are hearing sounds like detonation on a Rotary engine. It's what people on here call MIAC(Marbles In A Can) or some call it marbles in a blender sound. Are you using reg-87oct or prem-91+oct fuel? I had the same problem before and the dealer did the de-carbon cleaning and fixed it. I could use reg-87oct again but after a few thousand miles it came back and I had to use prem-91oct again. It's worse on HOT days. If you are using prem-gas and are still having loss of power and MIAC sound, which by the way is bad for the engine. You need the TSB done and hope it helps.....here is a copy of the TSB to bring to the dealer.

http://www.finishlineperformance.com...4-08-1924g.pdf

swoope

iTrader: (5)

you are where?

last recall done?

beers

Vader76

Edmonton, Alberta, Canada

Yes, I"m up to date on the recalls. I also always use 91 octane gas.

swoope

iTrader: (5)

the fuel pump is more like a on off switch.. it is good or bad. and sometimes it is bad, but it cools down and is good again..

i can say i have a bit of knowledge with this..

what you describe is more like dry apex seals..

the reason i asked about the last recall was they tend to do a vacuum test..

if you are still under warranty. and this is covered by the 8 year 100k mile one in the usa.. i think it is the same in canada, eh.

take to the dealer, say the car has a loss of power. that likely will get you a vacuum test and a compression test. if it fails, and it likely will with what you describe.

you get a carbon cleaning and retest.. that might fix the issue..

if not new motor time..

btw, if under warranty dont let them try the diagnostic fee crap..

beers